Then, and not till then, the mainspring of selfishness will be broken.
Perhaps this had originally been the mainspring of the understanding between them.
This gave rise to the invention of the stack-freed and fusee, both contrivances to equalize the power of the mainspring.
That need is the mainspring of life, the key to heaven, and the root of all evil.
It is basic, the mainspring of human endeavour and human advancement, rooted in nations and individuals by God.
The words were an echo of those which formed the mainspring of the Admiral's life.
There is the care of the mainspring I have intentionally reserved till the last.
You see, the mainspring of her nature must have been vanity.
All the old restraints were wanting, and self-interest alone formed the mainspring of action.
But, losing her brother, the mainspring of her life seemed broken.